Flush valve



Aug.2o,193s. F C, BINNALL l.2,012,255

FLUSH VALVE Filed Oct. 7, 1930 gfx/manto@ @Mgg/G5 adam,

Patented' Aug. 20, 1935 PATENT OFFICE FLUSH VALVE Frederick C. Binnall,Blue Ridge Summit, Pa., assignor,` by mesne assignments, to TradewaldCorporation, Washington, D. C., a corporation of Delaware,l and HarveyC. Bridgers Application october '1, 1930, serial No.' 481,050

10 Claims.

'I'his invention relatesv to ush valves and particularly to means forreducing the noise made by ush valves as they close.

The invention further provides improved means for mounting the valvestem so as to eliminate unnecessary noise and without the necessity ofmaking such valve stems fit so accurately as has been heretoforenecessary.

Referring to the accompanying drawing, which is made a part hereof andon which similar reference characters indicate similar parts',

Figure 1 is a vertical section of a flush valve showing my inventionapplied thereto.

Figure 2 is an enlarged section showing the assembly of the diaphragmforming a part of the valve,

Figure 3 is a section on line 3-3 of Figure l,

Figure 4 is a detail view of the porous or foraminous valve-silencingmeans forming a part of the preferred valve construction;

Figure 5 is a detail view of a modified form of porous or foraminousvalve-silencing means. I

In the drawing numeral I indicates the body` of the valve having aninlet chamber II andan outlet chamber I2. A cap I3 screw-threaded uponthe bodyA Ill connesa diaphragm I4 to provide a pressure chamber I abovethe diaphragm. A by-pass passage I 6 is provided through the diaphragmfor admitting pressure from the inlet passage to the chamber I5. A valvestem I1 depends into the outlet .chamber I2. The upper end of this valvestem has a flange I 8 scured thereon as by screw threads and a cap I9 isscrew threaded into this flange, the cap I8 and the ange I8 beingthreaded down against the inner edge of the diaphragm I4. The valve stemI1 is hollow and a valve 20 seatsvwithin the portion I9 to seal thevalve stem to prevent fluid from flowing from the pressure chamber I5through the valve, 'Ihe lower end of the valve stem I1 is supported inan annular series of lugs 2| which are formed on the inner side of thebody I0 of the valve and which hold the stem I1 against lateral movementto prevent it from oscillating during operation, thus eliminating anysound due to such oscillation. A manually operable lever 22 ispositioned in a cap 23. The inner circular portion of the handle restsagainst a pin 24 which pin is normally urged outwardly by means of aspring 25. Movement of the handle 22 in any direction will move the pin24 inwardly to strike against the lower end of the stem 26 dependingfrom the valve 20. This will lift one side of the valve from its seatand release the pressure of water in chamber I5. Pressure o! waterstituting the principal objection thereto.

in the chamber A-II therefore will lift the diaphragm I4 to permit waterto flow down around the seat 21 of the valve into the outlet chamber I2.As soon as the handle 22 is released the valve 20 resumes its positionon its seat and `-pressure 5 builds up in the chamber I5 by means ofwater owing through the restricted port I6. As soo'n asA the pressure inthe chamber I5 has become great enough the diaphragm I4 will be pressedto its seat 21. As the diaphragm nears its seat 21 rel0 stricting theflow of water from high pressure region II to low pressure region I2 itcauses its velocity to increase as it passes through the restriction.This increased velocity tends to produce a hissing sound which is highlyobjection- 15 I -around Ithe valve stem I1, whichforamincus or porousmember, when the diaphragm ilexes downwardly, approaching the valve seat21, ex-

tends well into the outlet port defined by said valve seat andmaterially reduces or dissipates 30 the tendency of the uid to owbetween the diaphragm I4 and the seat 21 at high, sound generatingvelocity, thus eliminating the final sounds common-to valves of thistype and con- 'I'he 35 screens 28 rest upon an annular series of pointedfins 29. Instead of the screens as shown at 28 I may provide a pluralityof perforated corrugated plates 30 as shown in Figure 5.

It will be obvious to those skilled in the art 40 that various changesmay be made in my device without departing from the spirit of theinvention and therefore I do not limit myself to what is shown in thedrawing and described in the speciiication, but only as indicated in theappended claims.

Having thus fully described my said invention, what I claim as new anddesire to secure by Letters Patent, is:

1. A flush valve comprising a casing having in- 5 let and dischargeopenings therein, a valve seat,

a diaphragm movable to rest upon said seat to` cut oi the now of waterthrough the valve, and means supported by and movable with saiddiaphragm for reducing the velocity of the water the valve.

owing through the valve as the valve nears its seat in closing, saidmeans comprising a plurality of screens positioned in the path of thewater flowing through the valve whereby the velocity of the water isdecreased.

2. A flush valve comprising a casing having inlet and discharge openingstherein, a valve seat, a diaphragm movable to rest upon said seat to cutoff the flow of water through the valve, and means supported by saiddiaphragm for reducing the velocity of the water owing through the valveas the valve nears its seat in closing, said means comprising aplurality of perforated corrugated disks positioned in the path of theWater owing through the Valve to reduce the velocity of the water.

3. A flush valve comprising a valve casing having fluid inlet and outletports therein, a diaphragm, a valve seat upon which said diaphragm reststo close the inlet from the outlet ports, a4

stem on saiddiaphragm, means on said stem for reducing the velocity ofthe water iiowing through said valve as thefdiaphragm approaches itsseat, said last named means comprising a plurality of screens mounted insuperposed relai tion on said stem and positioned in the path of thewater owing through said valve to reduce the velocity of the waterwhereby the sound ordinarily caused by high velocity of the waterVilowing through the valve is eliminated.

4. A ilush valve comprising a valve casing having iluid inlet and outletports therein, a diaphragm, a valve seat upon which said diaphragm reststo close the inlet from the outlet ports, a stem on said diaphragm,means on said stem for reducing the velocity of the water flowingthrough said valvek as the diaphragm approaches its seat, said meanscomprising a plurality of perforated corrugated disks mounted on saidvalve stem in the pathof the water owing through the valve to reduce thevelocity of the water to eliminate the sound ordinarily caused by thehigh velocity of the Water issuing through the valve.

. 5. A ilush valve comprising a casing having inletand outlet ports, avalve seat secured in said casing, a diaphragm valve secured in saidcasing said valve having a valve stem depending through the valve seat,a spider mounted in said casing adapted to guide said valve stem andsupport it against lateral movement, and means on said valve stemadapted to reduce the velocity of water owing through the valve as thevalve approaches the 4valve seat, said reducing means comprising aplurality of screen disks mounted in superposed relation upon said stemwithin the path of the water flowing through 6. A silent uid controlvalve comprising a casing having a uid passageway therethrough, a valveseat in said/casing passageway, a disk valve cooperative with said valveseat to close said passageway, means for moving said valve to casinghaving a uid passageway therethrough,

a valve seat in said casing passageway, a disk valve cooperative withsaid valve seat to close said passageway, means for moving said valve tocontrol fluid flow through said passageway, and a flow-restrictingmember composed of wire mesh carried by said valve and associatedwiththe walls of said passageway, said now-restricting member having suchporosity as to permit but materially reduce luid flow between said seatand said valve as said valve approaches said seat.

8. A silent uid control valve comprising a casing having a passagewaytherethrough, a valve seat in said casing passageway', a disk valvecooperative with said valve seat to close said passageway, means formoving said valve to control fluid new through said passageway, and aflow-restricting member comprising a plurality of perforated corrugateddisks carried by said valve and associated with the walls of saidpassageway, said now-restricting member having such porosity as topermit but materially reduce fluid ow between said seat and said valveas said valve approaches its seat.

9. In a valve, a casing having an inlet port, an outlet port and a valveseat intermediate said ports, a valve member movable with respect tosaid seat to control the flow of fluid from said inlet to said outletport, and a highly porous flow-restricting member movable into and outof close, now-restricting relation with the casing wall defining saidoutlet` port, said nowrestricting member being so coupled to and movablewith said valve member as to be in least eiective now-restrictingrelation with said outlet port when said valve is wide open, and to bein close, flow-restricting relation with said wall when said valve isnearly but/not completely seated. f I

10. A silent lvalve for liquid supply lines, comprising: a valve casinghaving a liquid passageway therethrough, which casing is provided withAan internal shoulder constituting an annular valve seat, a disk valveco-operative with said seat, and means for precluding the emission of ysound due to liquid flow through the space between said seat and valvewhen unseated, said

